Optically powered remote sensor apparatus with synchronizing means
US5223707A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jun 1, 1992 |
| Grant date | Jun 29, 1993 |
| Priority date | — |
| Expiry date | Jun 1, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01D5/268
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
Optically powered sensing apparatus which has a photodiode for converting optical power to electrical energy and a switching voltage converter for optimizing power transfer from the photo diode. A controller intermittently provides a synchronizing pulse train and a synchronizing receiver detects periods when optical power drops to zero. A transducer with driving and readout electronics provides electrical parameter signals which are digitized and synchronously transmitted to the controller during the periods of no optical power from the controller. Voltage regulation, impedance matching, and temperature compensation of the photodiode optimize power transfer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.